Cam bering-machine



(No Model.) '2 Sheets-Sheet 1.

WP CLARK.

GAMBERING MACHINE.

Patented May 23, 1882..

mug 9. (rm/g N. PETERS. Pholo-Lilhographlr, war-1mm an (No Model.) 2Sheets-Sheet 2.

W. CLARK.

w GAMBERING MACHINE. I No. 258,376. I Patented May 23, 1882.

u. PETERS. Pholndjlhvgmpher. Wmhinglom n. c.

UNITED STATES PATENT OFFICE.

WILLIAM CLARK, or rir'rseune, PENNSYLVANIA.

CAMBERING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 258,376, dated May 23,I882,

Application filed October 26, 1881. (No model.)

To all whom it may concern Be it known that I, WILLIAM CLARK, ofPittsburg, county of Allegheny, State of Pennsylvania, have invented ordiscovered a new and useful Improvement in Oambering-Machines; an d'I dohereby declare the following to be a full, clear, concise, and exactdescription thereof, reference being had to the accompanyin g drawings,making a part of this specification, in, which-like letters indicatinglike parts Figure 1, Sheet 1, is an end view of my improved machine.Fig. 2 is a top or plan view thereof, showing a rail in process of beingbent or cambered. Fig. 3, Sheet 2, is a side elevation of the machine;and Fig. 4 is a detached view, in elevation, of one of the guide-platesemployed.

My present invention relates to a machine chiefly designed for givingthe proper .or any desired camber to railway-rails,though by the properchanges in the forms or shapes of the operative surfaces it may beadapted to a like use with other heavy structural irons or steels; butas the invention can be well explained in its organization and use forbending railwayrails, I will so describe it.

It is well known that after a railway-rail has been brought to theproper shape by rolling it has to receive an upward curvature, whichshould be uniform from end to end, or nearly so. This curvature is givento it while still hot, or comparatively so, and is of such amount ordegree that it will about compensate for that tendency to curve in theopposite direction which results from unequal shrinkage in the head andbase of the rail while cooling. In practical use I run the rail as itleaves the finishingrolls onto a table and saw 0d the ends, so as togive it the desired length, and then pass it onto the cambering-machineshown in the drawings, where A represents the housings, and B a pair ofrolls.

The driving-gear and adjusting-screws are such as are well known in theart, and need not be described at length.

In suitable seats or recesses made in the inner or adjacent faces of thehousings I arrange four guides, a a c c, as here shown, of plate form,Fig. 2, the shape of each guide-plate being substantially as representedin Fig. 4, and those guides are so arranged that the projectthe feedingside is substantially as represented in Fig. 3, and such guides, inconnection with the working-faces of the rolls B at the point of bite,give, as also shown in Fig. 3, an opening, 6, approximately or exactlyof the form and size in cross-section of the rail to be bent.

In Fig. 2 I have shown the guides 0: cf on the feeding side as havingtheir inner faces parallel with each other and also parallel with theline offeed, or, in other words, in planes at right angles with the axesof the rolls. This is the preferable adjustment, since no difiicultywill then he experienced in passing the rail into the bite of the rolls;but the guides cc on the delivery side are adjusted or set somewhatangularly to the line of feed, as illustrated in Fig. 2, and to agreater or less angle, as may be desired, so that the outgoing end orpart of the rail shall thereby be deflected or bent to one side orlaterally as regards the line of feed or downwardly as regards the treador head of the rail. Power applied to thetrolls gives the forward feed.The operative bearingpoints in such bending operation are first alongthe face of the guide a, second on the shoulders s s of the rolls B, andthird along the face of the guide 0. The other guides, as also the otherbiting parts of the rolls, operate chiefly, if not entirely, as guidesfor keeping the rail properly in place and guiding it properly in itstravel. Preferably, each guide is made in two parts, as illustratedespecially in Fig. 3, where 1: represents a cast or wrought iron block,which operates as a holder to the steel face 1;, and the two are heldtogether by nuts '0 (shown in dotted lines,) which are screwed upon theclamping-bolts d and into recesses made in the back faces of the blocks27, as illustrated by dotted lines; but instead of attaching steelplates to the holders o, as described, the latter may be employed. asholders and carriers, each for one or more anti-friction rolls, theoperative faces of which may be adjusted in like manner with referenceto guiding and bending as is above described with ref erence to theguide-plates, and such substitute is hereby included herein as amechanical equi valent of the guides shown.

If desired, the guides at a may be set at a slight angle to what isrepresented as the line of feed, so that a part of the bending shall bedone on the feeding side of the rolls; but this is somewhatobjectionable on account of the difficulty which would then exist offeeding the rail far enough between the rolls for the latter to get afeeding bite thereon; but if, as may be done, separatefeeding anddelivery rolls are employed, this objection would be removed.

I am aware of and hereby disclaim the construction ofstraightening-machine shown and described in United States Patent No.85,917, January 19, 1869.

I claim herein as my invention- The rollsB B, having each a tongue orshoulder, 8, adapted to engage the under side of the head of a railwhile passing through,'in com- 20 bination with side guides on both thefeeding and delivery sides of the rolls, arranged and adjusted to engagethe top of the rail-head and bend the rail out of the direct line offeed to a uniform curvature, substantially as set forth. 2 5

In testimony whereof Ihave hereunto set my hand.

WILLIAM CLARK.

Witnesses:

R. H. WHITTLESEY, GEORGE H. OHRISTY.

